A treatise on navigation, and nautical astronomyBaldwin, Cradock, and Joy, 1824 - 551 Seiten |
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Seite 146
... moon's passing through the shadow of the earth , it is always observed that the bounding line of the shadow on the face of the moon is a curve line ; the earth therefore , which casts that shadow , must be a round body . To these and ...
... moon's passing through the shadow of the earth , it is always observed that the bounding line of the shadow on the face of the moon is a curve line ; the earth therefore , which casts that shadow , must be a round body . To these and ...
Seite 210
... moon is a satellite attending the earth , round which it revolves , from west to east , in about 27 days 8 hours , at a mean distance of about 240,000 miles . The planets , in the order of their distances from the sun , are Mercury ...
... moon is a satellite attending the earth , round which it revolves , from west to east , in about 27 days 8 hours , at a mean distance of about 240,000 miles . The planets , in the order of their distances from the sun , are Mercury ...
Seite 211
... moon in like manner is invisible when she is in the vicinity of the sun , or at new moon , and she appears like a full circle when she is in the opposite quarter of the heavens ; and the various appear- ances which she exhibits in other ...
... moon in like manner is invisible when she is in the vicinity of the sun , or at new moon , and she appears like a full circle when she is in the opposite quarter of the heavens ; and the various appear- ances which she exhibits in other ...
Seite 215
... moon's horizontal parallax and semidiameter , as seen from the centre of the earth , are given in the Nautical Almanac for every noon and midnight of Greenwich time . The parallax there given is the horizontal parallax of the earth's ...
... moon's horizontal parallax and semidiameter , as seen from the centre of the earth , are given in the Nautical Almanac for every noon and midnight of Greenwich time . The parallax there given is the horizontal parallax of the earth's ...
Seite 216
... moon , the parallactic angle B S K will not in any case much exceed a degree ; and as it is subtended by BK , which is nearly 4000 miles , the angle A S B subtended by A B , which on ship board cannot exceed a few feet , may be ...
... moon , the parallactic angle B S K will not in any case much exceed a degree ; and as it is subtended by BK , which is nearly 4000 miles , the angle A S B subtended by A B , which on ship board cannot exceed a few feet , may be ...
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Häufige Begriffe und Wortgruppen
angled spherical triangle Answer apparent altitude Atlantic Ocean bisected Cape celestial object centre chronometer circle column compass computed correction Cosec Cosine Cotang course and distance declination diff lat diff long Difference of Latitude difference of longitude Dist equal equator EXAMPLES FOR EXERCISE Given A B greater Greenwich Hence horizontal parallax Indian Archipelago Indian Ocean Island Latitude and Departure latitude and longitude logarithm longitude Lunar Distance meridian distance miles moon moon's Nautical Almanac noon observed opposite Pacific Ocean parallax parallel parallel sailing parallelogram perpendicular plane sailing polar distance pole quadrant radius rectangle rhumb line right angled spherical right ascension Secant semidiameter sides squares of A C subtract Suvers Suversed Sines Table Tang tangent Theo THEOREM triangle A B C true altitude true distance Vers
Beliebte Passagen
Seite 18 - LET it be granted that a straight line may be drawn from any one point to any other point.
Seite 17 - When equals are taken from unequals, the remainders are unequal. 6. Things which are double of the same thing, or equal things, are equal to each other.
Seite 86 - III.), is a circle. If the plane pass through the centre, then, as every point in the surface of the sphere is equidistant from its centre, the section is a plane figure, every point of whose periphery is equidistant from a certain point within it, and the figure is therefore a circle. But if the plane do not pass through...
Seite 26 - Therefore all the interior angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Seite 114 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Seite 63 - If from a point without a circle two straight lines be drawn, one of which...
Seite 147 - Mathematical o>jgraphy.) the arc of the equator, intercepted between the first meridian...
Seite 64 - If from any point without a circle straight lines be drawn touching it, the angle contained by the tangents is double the angle contained by the straight line joining the points of contact and the diameter drawn through one of them.
Seite 139 - Given the vertical angle, the difference of the two sides containing it, and the difference of the segments of the base made by a perpendicular from the vertex ; construct the triangle.
Seite 86 - ... half a right angle, as the tangent of half the sum of the angles, at the base of the triangle to the tangent of half their difference.